Mathematical Model of Center Core Ignition in the 175mm Gun

A mathematical model of the 175mm gun was constructed for the purpose of identifying the relative sensitivity of various propellant properties. This model treats ignition, flame spread, combustion, and propellant movement with a finite difference solution of the unsteady equations of fluid and particle motion. The solution includes representation of the center core igniter tube and black powder combustion in addition to M6 propellant. The solution also includes an unsteady analysis of barrel flow and projectile motion, which is concluded when the projectile passes from the barrel. The complete model is described in Calspan Report No. VQ-5163-D-1 and this report discusses specific improvements that were made in the area of center core ignition. (Author)